What are the potential issues when trying to integrate PHP scripts into HTML pages?

One potential issue when integrating PHP scripts into HTML pages is that the PHP code may not be executed if the file extension is not recognized by the server. To solve this, you can rename your HTML file to have a .php extension so that the server knows to parse the PHP code within it.

<!-- Rename your HTML file to have a .php extension -->
<!-- For example, change index.html to index.php -->